Here is a really cool fan film that focuses on Harley Quinn. It's called Red Queen, and it was directed by Salim. The short came along with the following description:
Set inside the mind of Harley Quinn as her guilt forces a confrontation with her original persona.
I really enjoyed watching this. The tone is perfect for what it is, and I liked the actress they got to play the lead role, Sheridyn Fisher. I also thought the way The Joker was portrayed was really well done. This team of people did a great job putting this film together. It looks like we will get another film in the series, as they call this one "Episode One." I hope so, because I'm looking forward to it.